Improvement in photographic sky-lights



C. D. MOSHER. Phptographic Skylights.

No. 137,790. PatentedApril15,1873.

Z I a fiZ W s %M@ UNITED STATES PATENT, OFFICE.

CHARLES D. MOSHER, OF COOK COUNTY, ILLINOIS.

IMPROVEMENT IN PHOTOGRAPHIC SKY-LIGHTS.

Specification forming part of Letters Patent No. 137,790, dated April15, 1873; application filed March 9, 1872.

To all whom it may concern:

Be it known that I, CHARLES D. Mosnnn, of the county of Cook, in theState of Illinois, have invented certain Improvements in theConstruction and Arrangement of Adjustable Sky-Lights for Photograph andother Art Galleries, of which the following is a specification:

Thefirst part of myinvention relates to a simple and effective plan forthe construction and suspension of an adjustable sky-light so that itmay be placed and held in position as the operator or manager may deemrequisite for the purpose of allowing light to enter the room inaccordance with the position of the sun, or

in such degree or at such an angle as may be desirable, with or withoutthe use of a sunshade, as will be shown. The second part of my inventionrelates to a combination, with adjustable sky-light, of adjustable andfolding side pieces moving with and adapting themselves to the positionof said sky-light and closing the apertures made between the roof andsky-light, as the latter is changed in position against the weather.

Reference will be had to the accompanying drawing forming part of thisspecification, in which Figure 1 is a side sectional view of myadjustable sky-light, showing method of suspension and side pieces. Fig.2 is an end view and vertical section of the same.

A is a sky-light constructed of glass set in a properly-braced frame,placed in roof B with hinge or pivot A, as shown at point 1, (see Figs.1 and 2,) and supported at its upper end by or from upright frame C,which (C) consists of two standards, 0 c, from the building, andcross-beam C, Fig. 2, in the following manner: a a and b b are blocksand cable-fastenings attached to cross-beam C at points 2 2 and to frameof sky-light at points 3 3, Fig. 2. To these blocks and cable-fasteningsare attached and affixed the short wire cables 11 01, thus forming theconnection between frame C and the frame of sky-light A; These shortwire cables are spliced to the main cableD at point 4,Fig. 2, which (D)runs over rollers e and f and down to Windlass E, to which it isattached, Figs. 1 and 2. To the upper corners of the frames of sky-lightare attached wire cables 9 g, which run over rollers h h on posts 0 cand have weights ii suspended respectively thereto. F

is a frame of iron or other substantial material, upon which may beplaced or hung a sun-shade.

To adjust the sky-light the operator, standing inside and turning at theWindlass through cable D and its attachments, raises or lowers the upperend of sky-light, which swings upon hinge or pivot A to such angle orposition as he may desire. The weights 6 'i, which are used as balances,move accordingly and give steadiness and ease of management to theoperation.

For the purpose of procuring the necessary sweep to the upper end of thesky-light, and

yet not protrude the same obj ectionably above or below the roof it isarranged that the line upon which the sky-light joins the roof may bethe center of such sweep, so that it can be depressed below said line asfar as it may be raised above. Hence, to close the openings to theweather, which shall be made by fixing the sky-light otherwise than atthis center, adjustable folding sides, made of rubber cloth G G, Figs. 1and 2, or other pliable and sub stantial material, are provided andattached to the roof and sky-light; and, in order that such cloth maykeep in proper position and may fold regularly and evenly as the sky-1ight is raised or lowered, bars j j, forming stiffeningframes for saidcloth are hinged or pivoted at point 1, so that they shall describe thesame sweep as the sky-light and may fold the cloth in manner like thatof the folding top of a carriage and thus these adjustable foldingsides, moving with, accommodate themselves to the position of, thesky-light, the frame of which is just enough smaller than the opening inthe roof to allow a free passage below when lowered. Thus it will beseen that the operator, standing at'and turning the Windlass, may easilyand readily adjust the sky-light at such an angle or position as he maydesire, and the as new and desire to secure by Letters Patent- 1. Theadjustable sky-light A, in combination with roof B, when so arrangedthat the upper end of said sky-light may be raised above or be depressedbelow the line of junction with said roof, in manner set forth.

2. The combination of upright frame C, placed upon roof B, withsky-light A, for the purpose indicated.

3. The combination of cable D, adjustable sky-light A, and upright'frameO, substantially as described.

4. The Windlass E and cable D, in connection with short cables d d andblocks and cable-fastenings a a and b b, for the purpose and as hereinset forth.

5. The adjustable folding sides G Gr, when used for the purpose and inthe manner described.

6. The bars jj, forming stiffening-frame for and used in combinationwith folding sides G G, as set forth.

To the above specification I have signed my hand this 6th day of March,1872.

CHARLES D. MOSHER,

Witnesses:

GHAs. B. SHEDD, F. I. WILsoN.

